Question

How many molecules are in 7.5*10^19 particles of Fe2O3?

Answer 1

7.5 × 10¹⁹ molecules Fe₂O₃

General Formulas and Concepts:

Chemistry - Atomic Structure

• Using Dimensional Analysis
• Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Step-by-step explanation:

Step 1: Define

7.5 × 10¹⁹ particles Fe₂O₃

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

`7.5 \cdot 10^(19) \ particles \ Fe_2O_3((6.022 \cdot 10^(23) \ molecules \ Fe_2O_3)/(6.022 \cdot 10^(23) \ particles \ Fe_2O_3) )` = 7.5 × 10¹⁹ molecules Fe₂O₃